Examples with RejectedExecutionException java.util.concurrent.RejectedExecutionException used on opensource projects

Example 11 with RejectedExecutionException

use of java.util.concurrent.RejectedExecutionException in project hadoop by apache.

the class NonAggregatingLogHandler method recover.

private void recover() throws IOException {
    if (stateStore.canRecover()) {
        RecoveredLogDeleterState state = stateStore.loadLogDeleterState();
        long now = System.currentTimeMillis();
        for (Map.Entry<ApplicationId, LogDeleterProto> entry : state.getLogDeleterMap().entrySet()) {
            ApplicationId appId = entry.getKey();
            LogDeleterProto proto = entry.getValue();
            long deleteDelayMsec = proto.getDeletionTime() - now;
            if (LOG.isDebugEnabled()) {
                LOG.debug("Scheduling deletion of " + appId + " logs in " + deleteDelayMsec + " msec");
            }
            LogDeleterRunnable logDeleter = new LogDeleterRunnable(proto.getUser(), appId);
            try {
                sched.schedule(logDeleter, deleteDelayMsec, TimeUnit.MILLISECONDS);
            } catch (RejectedExecutionException e) {
                // Handling this event in local thread before starting threads
                // or after calling sched.shutdownNow().
                logDeleter.run();
            }
        }
    }
}

Example 12 with RejectedExecutionException

use of java.util.concurrent.RejectedExecutionException in project hadoop by apache.

the class NonAggregatingLogHandler method handle.

@SuppressWarnings("unchecked")
@Override
public void handle(LogHandlerEvent event) {
    switch(event.getType()) {
        case APPLICATION_STARTED:
            LogHandlerAppStartedEvent appStartedEvent = (LogHandlerAppStartedEvent) event;
            this.appOwners.put(appStartedEvent.getApplicationId(), appStartedEvent.getUser());
            this.dispatcher.getEventHandler().handle(new ApplicationEvent(appStartedEvent.getApplicationId(), ApplicationEventType.APPLICATION_LOG_HANDLING_INITED));
            break;
        case CONTAINER_FINISHED:
            // Ignore
            break;
        case APPLICATION_FINISHED:
            LogHandlerAppFinishedEvent appFinishedEvent = (LogHandlerAppFinishedEvent) event;
            ApplicationId appId = appFinishedEvent.getApplicationId();
            // Schedule - so that logs are available on the UI till they're deleted.
            LOG.info("Scheduling Log Deletion for application: " + appId + ", with delay of " + this.deleteDelaySeconds + " seconds");
            String user = appOwners.remove(appId);
            if (user == null) {
                LOG.error("Unable to locate user for " + appId);
                // send LOG_HANDLING_FAILED out
                NonAggregatingLogHandler.this.dispatcher.getEventHandler().handle(new ApplicationEvent(appId, ApplicationEventType.APPLICATION_LOG_HANDLING_FAILED));
                break;
            }
            LogDeleterRunnable logDeleter = new LogDeleterRunnable(user, appId);
            long deletionTimestamp = System.currentTimeMillis() + this.deleteDelaySeconds * 1000;
            LogDeleterProto deleterProto = LogDeleterProto.newBuilder().setUser(user).setDeletionTime(deletionTimestamp).build();
            try {
                stateStore.storeLogDeleter(appId, deleterProto);
            } catch (IOException e) {
                LOG.error("Unable to record log deleter state", e);
            }
            try {
                sched.schedule(logDeleter, this.deleteDelaySeconds, TimeUnit.SECONDS);
            } catch (RejectedExecutionException e) {
                // Handling this event in local thread before starting threads
                // or after calling sched.shutdownNow().
                logDeleter.run();
            }
            break;
        default:
            // Ignore
            ;
    }
}

Example 13 with RejectedExecutionException

use of java.util.concurrent.RejectedExecutionException in project hadoop by apache.

the class AzureFileSystemThreadPoolExecutor method executeParallel.

/**
   * Execute the file operation parallel using threads. All threads works on a
   * single working set of files stored in input 'contents'. The synchronization
   * between multiple threads is achieved through retrieving atomic index value
   * from the array. Once thread gets the index, it retrieves the file and initiates
   * the file operation. The advantage with this method is that file operations
   * doesn't get serialized due to any thread. Also, the input copy is not changed
   * such that caller can reuse the list for other purposes.
   *
   * This implementation also considers that failure of operation on single file
   * is considered as overall operation failure. All threads bail out their execution
   * as soon as they detect any single thread either got exception or operation is failed.
   *
   * @param contents
   *        List of blobs on which operation to be done.
   * @param threadOperation
   *        The actual operation to be executed by each thread on a file.
   *
   * @param operationStatus
   *        Returns true if the operation is success, false if operation is failed.
   * @throws IOException
   *
   */
boolean executeParallel(FileMetadata[] contents, AzureFileSystemThreadTask threadOperation) throws IOException {
    boolean operationStatus = false;
    boolean threadsEnabled = false;
    int threadCount = this.threadCount;
    ThreadPoolExecutor ioThreadPool = null;
    // Start time for file operation
    long start = Time.monotonicNow();
    // If number of files  are less then reduce threads to file count.
    threadCount = Math.min(contents.length, threadCount);
    if (threadCount > 1) {
        try {
            ioThreadPool = getThreadPool(threadCount);
            threadsEnabled = true;
        } catch (Exception e) {
            // The possibility of this scenario is very remote. Added this code as safety net.
            LOG.warn("Failed to create thread pool with threads {} for operation {} on blob {}." + " Use config {} to set less number of threads. Setting config value to <= 1 will disable threads.", threadCount, operation, key, config);
        }
    } else {
        LOG.warn("Disabling threads for {} operation as thread count {} is <= 1", operation, threadCount);
    }
    if (threadsEnabled) {
        LOG.debug("Using thread pool for {} operation with threads {}", operation, threadCount);
        boolean started = false;
        AzureFileSystemThreadRunnable runnable = new AzureFileSystemThreadRunnable(contents, threadOperation, operation);
        // Don't start any new requests if there is an exception from any one thread.
        for (int i = 0; i < threadCount && runnable.lastException == null && runnable.operationStatus; i++) {
            try {
                ioThreadPool.execute(runnable);
                started = true;
            } catch (RejectedExecutionException ex) {
                // If threads can't be scheduled then report error and move ahead with next thread.
                // Don't fail operation due to this issue.
                LOG.error("Rejected execution of thread for {} operation on blob {}." + " Continuing with existing threads. Use config {} to set less number of threads" + " to avoid this error", operation, key, config);
            }
        }
        // Stop accepting any new execute requests.
        ioThreadPool.shutdown();
        try {
            // Wait for threads to terminate. Keep time out as large value
            ioThreadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.DAYS);
        } catch (InterruptedException intrEx) {
            // If current thread got interrupted then shutdown all threads now.
            ioThreadPool.shutdownNow();
            // Restore the interrupted status
            Thread.currentThread().interrupt();
            LOG.error("Threads got interrupted {} blob operation for {} ", operation, key);
        }
        int threadsNotUsed = threadCount - runnable.threadsUsed.get();
        if (threadsNotUsed > 0) {
            LOG.warn("{} threads not used for {} operation on blob {}", threadsNotUsed, operation, key);
        }
        if (!started) {
            // No threads started. Fall back to serial mode.
            threadsEnabled = false;
            LOG.info("Not able to schedule threads to {} blob {}. Fall back to {} blob serially.", operation, key, operation);
        } else {
            IOException lastException = runnable.lastException;
            // as failure only if file operations are not done on all files.
            if (lastException == null && runnable.operationStatus && runnable.filesProcessed.get() < contents.length) {
                LOG.error("{} failed as operation on subfolders and files failed.", operation);
                lastException = new IOException(operation + " failed as operation on subfolders and files failed.");
            }
            if (lastException != null) {
                // Raise the same exception.
                throw lastException;
            }
            operationStatus = runnable.operationStatus;
        }
    }
    if (!threadsEnabled) {
        // No threads. Serialize the operation. Clear any last exceptions.
        LOG.debug("Serializing the {} operation", operation);
        for (int i = 0; i < contents.length; i++) {
            if (!threadOperation.execute(contents[i])) {
                LOG.warn("Failed to {} file {}", operation, contents[i]);
                return false;
            }
        }
        // Operation is success
        operationStatus = true;
    }
    // Find the duration of time taken for file operation
    long end = Time.monotonicNow();
    LOG.info("Time taken for {} operation is: {} ms with threads: {}", operation, (end - start), threadCount);
    return operationStatus;
}

Example 14 with RejectedExecutionException

use of java.util.concurrent.RejectedExecutionException in project hadoop by apache.

the class TestFileSystemOperationsWithThreads method testRenameThreadPoolExecuteSingleThreadFailure.

/*
   * Test case for rename operation with multiple threads and flat listing enabled.
   */
@Test
public void testRenameThreadPoolExecuteSingleThreadFailure() throws Exception {
    // Spy azure file system object and return mocked thread pool
    NativeAzureFileSystem mockFs = Mockito.spy((NativeAzureFileSystem) fs);
    // Spy a thread pool executor and link it to azure file system object.
    String path = mockFs.pathToKey(mockFs.makeAbsolute(new Path("root")));
    AzureFileSystemThreadPoolExecutor mockThreadPoolExecutor = Mockito.spy(mockFs.getThreadPoolExecutor(renameThreads, "AzureBlobRenameThread", "Rename", path, NativeAzureFileSystem.AZURE_RENAME_THREADS));
    // With single iteration, we would have created 7 blobs resulting 7 threads.
    Mockito.when(mockFs.getThreadPoolExecutor(renameThreads, "AzureBlobRenameThread", "Rename", path, NativeAzureFileSystem.AZURE_RENAME_THREADS)).thenReturn(mockThreadPoolExecutor);
    // Create a thread executor and link it to mocked thread pool executor object.
    ThreadPoolExecutor mockThreadExecutor = Mockito.spy(mockThreadPoolExecutor.getThreadPool(7));
    Mockito.when(mockThreadPoolExecutor.getThreadPool(7)).thenReturn(mockThreadExecutor);
    // Mock thread executor to throw exception for all requests.
    Mockito.doCallRealMethod().doThrow(new RejectedExecutionException()).when(mockThreadExecutor).execute(Mockito.any(Runnable.class));
    validateRenameFolder(mockFs, "root", "rootnew");
    // Validate from logs that threads are enabled and unused threads exists.
    String content = logs.getOutput();
    assertTrue(content.contains("Using thread pool for Rename operation with threads 7"));
    assertTrue(content.contains("6 threads not used for Rename operation on blob"));
}

Example 15 with RejectedExecutionException

use of java.util.concurrent.RejectedExecutionException in project hadoop by apache.

the class TestFileSystemOperationsWithThreads method testDeleteThreadPoolExecuteSingleThreadFailure.

/*
   * Test case for delete operation with multiple threads and flat listing enabled.
   */
@Test
public void testDeleteThreadPoolExecuteSingleThreadFailure() throws Exception {
    // Spy azure file system object and return mocked thread pool
    NativeAzureFileSystem mockFs = Mockito.spy((NativeAzureFileSystem) fs);
    // Spy a thread pool executor and link it to azure file system object.
    String path = mockFs.pathToKey(mockFs.makeAbsolute(new Path("root")));
    AzureFileSystemThreadPoolExecutor mockThreadPoolExecutor = Mockito.spy(mockFs.getThreadPoolExecutor(deleteThreads, "AzureBlobDeleteThread", "Delete", path, NativeAzureFileSystem.AZURE_DELETE_THREADS));
    // With single iteration, we would have created 7 blobs resulting 7 threads.
    Mockito.when(mockFs.getThreadPoolExecutor(deleteThreads, "AzureBlobDeleteThread", "Delete", path, NativeAzureFileSystem.AZURE_DELETE_THREADS)).thenReturn(mockThreadPoolExecutor);
    // Create a thread executor and link it to mocked thread pool executor object.
    ThreadPoolExecutor mockThreadExecutor = Mockito.spy(mockThreadPoolExecutor.getThreadPool(7));
    Mockito.when(mockThreadPoolExecutor.getThreadPool(7)).thenReturn(mockThreadExecutor);
    // Mock thread executor to throw exception for all requests.
    Mockito.doCallRealMethod().doThrow(new RejectedExecutionException()).when(mockThreadExecutor).execute(Mockito.any(Runnable.class));
    validateDeleteFolder(mockFs, "root");
    // Validate from logs that threads are enabled and unused threads.
    String content = logs.getOutput();
    assertTrue(content.contains("Using thread pool for Delete operation with threads 7"));
    assertTrue(content.contains("6 threads not used for Delete operation on blob"));
}